Contra Costa County property record for 4210 Knightsen Ave, Oakley, CA 94561
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 2 ba · 1,368 sqft · built 1942 |
| Lot Size | 4.2 acres (182,952 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $355,000 (Jun 2011) |
| Tax Bill | $4,983 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 032-030-001-5 |
| Primary APN | 032-030-001-5 |
|---|---|
| Alternative APN |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 2 Baths |
| Stories | 1 Story |
| Building Area | 1,368 sqft Living Area |
| 1st Floor Area | 1,368 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1942 |
|---|---|
| Effective Year Built | Effective 1949 |
| Architectural Style | Ranch |
| Exterior Material | Stucco |
| Roof Material | Composition Shingle |
| Lot Area | 182,952 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Baseboard |
| Heating Fuel | Electric |
| Sewer | Septic |
| Street Address | 4210 KNIGHTSEN AVE |
|---|---|
| City | OAKLEY |
| State | CA |
| Zip | 94561-3616 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | A2 |
| Legal Description | POR SEC 29 T2N R3E EX MR |
| Legal Range | 03E |
| Legal Township | 02N |
| Legal Section | 29 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | EAST CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2007 |
| Census Tract | 302011 |
4210 Knightsen Ave is owned and occupied by two individuals who bought it in June 2011.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 4210 KNIGHTSEN AVE, OAKLEY, CA 94561-3616 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jun 13, 2011 · Amount on File |
| Deed Sale | Jun 13, 2011 · Amount on File |
| Prior Sale | Jan 16, 2008 · Amount on File |
| Deed Document Number | 2011116479 |
| Prior Transfer Date | Jun 23, 1998 |
| Prior Transfer Doc | 0000145222 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 4210 Knightsen Ave was $4,983 with a homeowner's exemption.
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Secondary School District | Liberty Union High School District (09 - 12) |
| Elementary School District | Oakley Union Elementary School District (KG - 08) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $463,902 (+2%) Land $307,093 Building $156,809 | |
| 2025 | $4,983.00 Homeowner's exemption | $454,807 Land $301,072 Building $153,735 |
| 2023 | $4,828.00 (+1%) Homeowner's exemption | $437,148 Land $289,382 Building $147,766 |
| 2022 | $4,780.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 4210 Knightsen Ave in Zone X, an area of minimal flood risk, though there have been 2 flood claims nearby since 2017.
Source: FEMA National Flood Hazard Layer, effective October 12, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Community Rating System | Class 6 (20% premium discount) |
| Nearby Flood Policies | 6 in force |
| Nearby Flood Claims | 2 (2017–2022) |
| Most Recent Claim | Dec 2022 · Severe Winter Storms, Flooding, Landslides, And Mudslides |
Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.
Wildfire risk around 4210 Knightsen Ave is high, ranking above 73% of the US, with a 0.4% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | High above 73% of the US · above 48% of California |
|---|---|
| Wildfire Likelihood | 0.4% annual chance |
| Exposure | Direct burnable vegetation |
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Source: FCC Broadband Data Collection, based on 142 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: AT&T.
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